— Industrial experiments on the hydrometallurgical recovery of heavy metals were carried out to identify ways to prevent heavy metal leaching from stainless steel tail slag and provide a scientific basis for producing steel slag fertilizers. The results showed that the comprehensive recovery percentages for metals could reach up to 86% to 95% …
Stainless steel is a corrosion-resistant alloy of iron, chromium and, in some cases, nickel and other metals. Completely and infinitely recyclable, stainless steel is the "green material" par excellence. In fact, within the construction sector, its actual recovery rate is …
— The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast …
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— Section snippets Stainless-steel based Co 3 O 4-doped catalyst electrode. Firstly, 15 g of boric acid (H 3 BO 3) and 12 g of sodium lauryl sulfate (SLS) was put into 1000 mL of deionized water containing 0.2 mol of Co 2 SO 4 and 0.1 mol of CoCl 2.This mixed solution was stirred at room temperature for 2 h. Subsequently, the prepared …
— Chromium-bearing slags produced during the stainless-steel smelting (SSS) are important recyclable secondary resources. Recovery of chromium from these slags is not only beneficial to increase the ...
— Thus, metal recovery from stainless steel waste water can combine environmental and economic demands, as a payback-time of <4 years becomes feasible. The metals in the remaining solution have to be precipitated. The amount of lime milk required for this treatment is reduced according to the amount of recovered nickel.
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— Abstract. Stainless-steel slag is a hazardous solid that has caused severe chromium contamination globally. This study proposes an environmentally benign …
— Leuchtenmüller et al. (2019) studied the kinetics of carbon heat recovery of chromium from stainless steel slag. Based on experimental measurements, a prediction model was developed to predict the treatment time required to reach a specific final chromium concentration as a function of the initial concentration and the required …
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— Moreover, recovery of struvite can simply be achieved by light scraping of the mesh. Suzuki et al. (2005) concluded that the ease of use and robustness of similar recovery systems would be particularly attractive for swine farmers. The utilisation of this type of processes would also decrease the risk of operational failures or reduction of the ...
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— Chromium-bearing slags produced during the stainless-steel smelting (SSS) are important recyclable secondary resources. Recovery of chromium from these slags is not only beneficial to increase the slag's economic potential but also favorable to solve the environmental problems induced by the chromium (VI) in the slags.
— Stainless steel pickling liquor is obtained when a steel surface is treated with hydrofluoric and nitric acid mixtures. Industrial treatments of this dangerous and toxic effluent are focused on acid recovery, while metals are considered as a waste to be managed. Thus, a process taking into account the need to recover valuable metals is …
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— Stainless steel slag (SS slag) is a by-product generated during the production of stainless steel, at approximately one ton of slag per 3 tonnes of produced stainless steel. The global stainless steel production was 38 Mt in 2013 [2]. Cr concentrations in FeCr and SS slags are in the range of 2–8% and 1–2%, respectively.
— Abstract. The conventional process used to treat waste acids from the stainless steel pickling baths is a direct neutralization with alkali. However, this process requires a high consumption of chemicals, produces a large amount of solid wastes, and furthermore, does not meet the recent European Waste Treatment Regulation because …
Abstract. The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge.
Completely and infinitely recyclable, stainless steel is the "green material" par excellence. In fact, within the construction sector, its actual recovery rate is close to . Stainless steel is also environmentally neutral and inert, and its longevity ensures it meets the needs of sustainable construction.
— In hydrometallurgical procedures, employing an inorganic acid as a lixiviating agent such as HCl [13], [14], or [15] is the most common method. According to those given in the literature, HCl,, and can …
1 Stainless steel is an excellent material that is widely used in construction, transportation, food processing, energy, and a variety of other fields of the national economy [1, 2]. ... Selective recovery of nickel from stainless steel pickling sludge with NH 3-(NH 4) 2 CO 3 leaching system.
— Process 1 is the self-reduction of stainless steel dust particles, process 2 is the reduction of stainless steel dust particles in Fe C (Si) bath, and process 3 is the …
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